OCR software is made for the purpose of creating the fonts table as the means by which searchable text is created or any other form of text is created for export to another application. Either you have an OCR scan software creating the font table, or you don’t have OCR software OR an OCR scan. To have an OCR scan, a font table nust be created and exported to the PDF, otherwise it is by definition not an OCR scan.
Do you have a source for that? I've been searching and can't find any discussion of OCR putting a font table into a PDF. I'm not sure why it would be necessary, since plain ASCII text with no formatting is adequate for making a searchable PDF (which is what OCR is for). And none of the OCR I've done with the intention of exporting the text to another application ever bothered trying to specify or render the font.
You can make an OCR scanned document without embedding fonts, but it wouldn't show up the same for every user. This isn't a concern here, because it was scanned in a way that preserves the look of the original as an image, with a hidden text layer on top of it.